Counterjib part of a tower crane



FIG. 1 is a front perspective view of a counterjib part of a tower crane, showing my new design;

FIG. 2 is a first side elevational view thereof;

FIG. 3 is a second side elevational view thereof taken from the side opposite that of FIG. 2;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is an enlarged rear elevational view thereof; and,

FIG. 7 is an enlarged front elevational view thereof. 

The ornamental design for a counterjib part of a tower crane, as shown and described. 